Photovoltaic effect in GaSe

Y. Depeursinge; C. Depeursinge

doi:10.1088/0022-3719/12/22/026

Photovoltaic effect in GaSe

Y. Depeursinge^*, C. Depeursinge

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Photovoltaic spectra of pure and doped (Cu, Cd, Sb) samples of GaSe were measured at temperatures between 1.5 and 300K. The spectra are composed of a large background modulated by a fine structure whose excitonic origin is established. The presence of this fine structure in the vicinity of the indirect transition reveals the existence of an indirect exciton in GaSe. The effect of the excitonic coupling on the photovoltaic spectra is strongly dependent on the purity of the sample: it produces dips in pure crystals and peaks in doped ones. The corresponding recombination mechanisms of electrons and holes are examined and a model is proposed, which is consistent with earlier luminescence data.

Original language	English (US)
Article number	026
Pages (from-to)	4851-4856
Number of pages	6
Journal	Journal of Physics C: Solid State Physics
Volume	12
Issue number	22
DOIs	https://doi.org/10.1088/0022-3719/12/22/026
State	Published - 1979
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics
General Engineering
General Physics and Astronomy

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10.1088/0022-3719/12/22/026

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author = "Y. Depeursinge and C. Depeursinge",

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AU - Depeursinge, Y.

AU - Depeursinge, C.

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AB - Photovoltaic spectra of pure and doped (Cu, Cd, Sb) samples of GaSe were measured at temperatures between 1.5 and 300K. The spectra are composed of a large background modulated by a fine structure whose excitonic origin is established. The presence of this fine structure in the vicinity of the indirect transition reveals the existence of an indirect exciton in GaSe. The effect of the excitonic coupling on the photovoltaic spectra is strongly dependent on the purity of the sample: it produces dips in pure crystals and peaks in doped ones. The corresponding recombination mechanisms of electrons and holes are examined and a model is proposed, which is consistent with earlier luminescence data.

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Photovoltaic effect in GaSe

Abstract

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